63400020 has 24 divisors (see below), whose sum is σ = 177520224. Its totient is φ = 16906656.

The previous prime is 63400019. The next prime is 63400027. The reversal of 63400020 is 2000436.

63400020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63400027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528274 + ... + 528393.

It is an arithmetic number, because the mean of its divisors is an integer number (7396676).

Almost surely, 2^63400020 is an apocalyptic number.

63400020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63400020 is an abundant number, since it is smaller than the sum of its proper divisors (114120204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63400020 is a wasteful number, since it uses less digits than its factorization.

63400020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056679 (or 1056677 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 63400020 is about 7962.4129508586. The cubic root of 63400020 is about 398.7461152060.

Adding to 63400020 its reverse (2000436), we get a palindrome (65400456).

The spelling of 63400020 in words is "sixty-three million, four hundred thousand, twenty".